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在阴茎状细胞癌中选择性四核酸重复 (EMAST) 的微卫星变化增加 - - 没有证据表明它在致癌过程中起作用
August Fiegl1,2,3, Olaf Wendler2,3,4, Johannes Giedl1,2,3
1Institute of Pathology, University Hospital Erlangen-Nürnberg, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany.
Current oncology (Toronto, Ont.)
|October 25, 2024
概括
这项研究没有发现任何证据表明在精选的四核酸重复 (EMAST) 或MSH3缺乏性阴茎状细胞癌 (pSCC) 中微卫星变化升高. 这些发现表明EMAST和MSH3不是可靠的pSCC患者免疫治疗的生物标志物.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 癌症生物标志物 癌症生物标志物
背景情况:
- 阴茎状细胞癌 (pSCC) 是一种罕见的癌症,对转移性疾病的预后不佳.
- 免疫检查点抑制剂 (ICI) 在各种癌症中表现有前途,但它们的有效性通常是由微观卫星不稳定性 (MSI) 等生物标志物预测的.
- 在pSCC中没有观察到MSI,限制了免疫疗法选择,促使研究相关的基因组变化,如EMAST.
研究的目的:
- 调查在精选的四核酸重复 (EMAST) 和MSH3表达在阴茎状细胞癌 (pSCC) 中升高的微卫星变化的存在和潜在作用.
- 确定EMAST或MSH3缺乏是否可以作为pSCC中免疫治疗反应的预测生物标志物.
- 为了进一步了解EMAST,MSI和pSCC致癌之间的关系.
主要方法:
- 使用聚合酶链反应 (PCR) 和五种微卫星标记物的碎片分析,分析了78例pscc的EMAST.
- 在同一pSCC队列中对MSH3蛋白表达的免疫组织化学评估.
- EMAST和MSH3表达与pSCC特征和潜在生物标志物的实用性相关.
主要成果:
- 在任何pSCC病例中,在分析的微卫星标记物中都没有检测到EMAST的实例.
- 所有可评估的pSCC样本都显示保留了MSH3蛋白表达.
- 这些结果与之前的pSCC中MSI频率非常低的研究结果一致.
结论:
- 埃马斯特和MSH3缺乏似乎没有参与pSCC的发展.
- 无论是EMAST还是MSH3缺乏,都不太可能成为阴茎癌免疫治疗的可靠预测生物标志物.
- 需要进一步的研究,以确定新的治疗标和预测生物标志物,用于pSCC的免疫治疗.
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